{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/80227"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/80227","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Assays for deterioration and estimates of feeding value of corn silage","abstract":"Corn silages were selected from samples analyzed in the Virginia Tech Forage Testing Laboratory. A sample selection scheme employing observation of silage quality indicators (color, mold, aroma, fermentation type) was utilized to obtain a sample set encompassing a wide range in deterioration. In vitro digestible organic matter (IVDOM) was the criteria used to estimate feeding value. The full data set contained 142 corn silages which averaged 59.8 ± 6.6% and ranged from 38.5 to 74.7% IVDOM. Simple and multiple regression of IVDOM on chemical constituents were performed for the full data set and within fermentation groups. Coefficients of determination (R² ) revealed that acid detergent fiber (ADF) and dry matter (DM) explained the largest proportion of variation in IVDOM. The simple regression on the full data set resulted in R² of .352 and .208 with standard errors of the prediction S<sub>y.x</sub> of 5.29 and 5.86 for ADF and DM, respectively. Multiple regression analyses resulted in minor improvements in S<sub>y.x</sub>. These data suggest the inclusion of other variables besides ADF and DM in the prediction equation is unwarranted. Corn silage IVDOM was predicted employing Near-infrared reflectance techniques. A calibration resulted in R² of .77, S<sub>y.x</sub> of 5.38. The calibration equation was tested for the prediction of IVDOM for an additional 90 corn silages. The regression of NIR predicted IVDOM resulted in an R² of .37 and S<sub>y.x</sub> of 4.04. The prediction of corn silage IVDOM by NIR or ADF were similar.","abstract_html":"Corn silages were selected from samples analyzed in the Virginia Tech Forage Testing Laboratory. A sample selection scheme employing observation of silage quality indicators (color, mold, aroma, fermentation type) was utilized to obtain a sample set encompassing a wide range in deterioration. In vitro digestible organic matter (IVDOM) was the criteria used to estimate feeding value. The full data set contained 142 corn silages which averaged 59.8 ± 6.6% and ranged from 38.5 to 74.7% IVDOM. Simple and multiple regression of IVDOM on chemical constituents were performed for the full data set and within fermentation groups. Coefficients of determination (R² ) revealed that acid detergent fiber (ADF) and dry matter (DM) explained the largest proportion of variation in IVDOM. The simple regression on the full data set resulted in R² of .352 and .208 with standard errors of the prediction S&lt;sub&gt;y.x&lt;/sub&gt; of 5.29 and 5.86 for ADF and DM, respectively. Multiple regression analyses resulted in minor improvements in S&lt;sub&gt;y.x&lt;/sub&gt;. These data suggest the inclusion of other variables besides ADF and DM in the prediction equation is unwarranted. Corn silage IVDOM was predicted employing Near-infrared reflectance techniques. A calibration resulted in R² of .77, S&lt;sub&gt;y.x&lt;/sub&gt; of 5.38. The calibration equation was tested for the prediction of IVDOM for an additional 90 corn silages. The regression of NIR predicted IVDOM resulted in an R² of .37 and S&lt;sub&gt;y.x&lt;/sub&gt; of 4.04. The prediction of corn silage IVDOM by NIR or ADF were similar.","abstract_has_math":false,"creators":["Moe, Aaron J."],"institution":"Virginia Polytechnic Institute and State University","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Dairy Science","degree_department":"Dairy Science","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1982,"date_issued":"1982","date_published":"1982","updated_at":"2026-07-22T22:20:32Z","subjects":[],"languages":["en_US"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/80227","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Dairy Science"]},{"key":"dc:creator","label":"Author","values":["Moe, Aaron J."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-11-09T21:31:51Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2017-11-09T21:31:51Z"]},{"key":"dc:date.issued","label":"Date","values":["1982"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Dairy Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/80227"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Corn silages were selected from samples analyzed in the Virginia Tech Forage Testing Laboratory. A sample selection scheme employing observation of silage quality indicators (color, mold, aroma, fermentation type) was utilized to obtain a sample set encompassing a wide range in deterioration. In vitro digestible organic matter (IVDOM) was the criteria used to estimate feeding value. The full data set contained 142 corn silages which averaged 59.8 ± 6.6% and ranged from 38.5 to 74.7% IVDOM. Simple and multiple regression of IVDOM on chemical constituents were performed for the full data set and within fermentation groups. Coefficients of determination (R² ) revealed that acid detergent fiber (ADF) and dry matter (DM) explained the largest proportion of variation in IVDOM. The simple regression on the full data set resulted in R² of .352 and .208 with standard errors of the prediction S<sub>y.x</sub> of 5.29 and 5.86 for ADF and DM, respectively. Multiple regression analyses resulted in minor improvements in S<sub>y.x</sub>. These data suggest the inclusion of other variables besides ADF and DM in the prediction equation is unwarranted. Corn silage IVDOM was predicted employing Near-infrared reflectance techniques. A calibration resulted in R² of .77, S<sub>y.x</sub> of 5.38. The calibration equation was tested for the prediction of IVDOM for an additional 90 corn silages. The regression of NIR predicted IVDOM resulted in an R² of .37 and S<sub>y.x</sub> of 4.04. The prediction of corn silage IVDOM by NIR or ADF were similar."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Assays for deterioration and estimates of feeding value of corn silage"]}]}],"canonical_facts":{"dc:contributor.department":["Dairy Science"],"dc:creator":["Moe, Aaron J."],"dc:date.accessioned":["2017-11-09T21:31:51Z"],"dc:date.available":["2017-11-09T21:31:51Z"],"dc:date.issued":["1982"],"dc:description.abstract":["Corn silages were selected from samples analyzed in the Virginia Tech Forage Testing Laboratory. A sample selection scheme employing observation of silage quality indicators (color, mold, aroma, fermentation type) was utilized to obtain a sample set encompassing a wide range in deterioration. In vitro digestible organic matter (IVDOM) was the criteria used to estimate feeding value. The full data set contained 142 corn silages which averaged 59.8 ± 6.6% and ranged from 38.5 to 74.7% IVDOM. Simple and multiple regression of IVDOM on chemical constituents were performed for the full data set and within fermentation groups. Coefficients of determination (R² ) revealed that acid detergent fiber (ADF) and dry matter (DM) explained the largest proportion of variation in IVDOM. The simple regression on the full data set resulted in R² of .352 and .208 with standard errors of the prediction S<sub>y.x</sub> of 5.29 and 5.86 for ADF and DM, respectively. Multiple regression analyses resulted in minor improvements in S<sub>y.x</sub>. These data suggest the inclusion of other variables besides ADF and DM in the prediction equation is unwarranted. Corn silage IVDOM was predicted employing Near-infrared reflectance techniques. A calibration resulted in R² of .77, S<sub>y.x</sub> of 5.38. The calibration equation was tested for the prediction of IVDOM for an additional 90 corn silages. The regression of NIR predicted IVDOM resulted in an R² of .37 and S<sub>y.x</sub> of 4.04. The prediction of corn silage IVDOM by NIR or ADF were similar."],"dc:description.degree":["Master of Science"],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/80227"],"dc:language.iso":["en_US"],"dc:publisher":["Virginia Polytechnic Institute and State University"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Assays for deterioration and estimates of feeding value of corn silage"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Dairy Science"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:20:32Z"}